Pulsator for milking-machines.



L. BULL.

PULSATOR FYOR MILKING MACHINES. APPLlcATmN FILED DEc.19. 1914.

Patented Nov. '14, 1916.

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L. BULL. r 4 FULSATOR FOR MILKING MACHINES.

APPLlcATLoN FILED nec. Le. 1914.

' 1,204,542, Patented Nov. 14, 1916.

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UNTTED sTATEs PATENT oEEIoE.

LIONEL BULL, OF LIBERTYVILLE, ILLINOIS, .ASSIGNOB 0F ONE-HALF TD GEORGER.

LINN, 0F CHICAGO, ILLINOIS.

vPJ'II'JSA'JJOR, FOR MILKING-MACHINES.

- larly to the means for intermittently varying the pressure in amilking system.

Y ITheobjects of my invention are primarily to obtain a rhythmicvariation of the minus pressure in the teat-cups, and to providemomentum devices for the means for so doing that govern and make saidaction more rhythmic and greatly relieve the tax on the power of thevacuum generator. This I accomplish by the means hereinafter fullydescribed, and as particularly pointed out in the claims.

In the drawings: Figure 1 is a side elevation of my invention. Fig. 2 isa plan view thereof. Fig. 3 is a vertical section of the rotary valves,taken on dotted line 3-3, Fig. 2. Fig. 4 is a longitudinal central sec'-tion of one of the valves and its casing. Fig.

5 isa perspective View of one of said valves removed from its casing.

It 1s unnecessary yto illustrate or describe v either the vacuumcreating pump or mechanism or the teat-cups, as any of these features'now in extensive use can be employed, and so I have coni-ined thisspecification to the illustration and description of my improved meansfor utilizing the same.

Referring to the drawings, A represents a base of any suitable designwhich has opposed long ritudinally disposed cylinders B and B mounted onplatforms integral with saidbase and located thereon. The axes of thesecylinders are, preferably, offset to a slight extent and said cylindersare provided with piston-heads that are connected by pitmen b, b, to asingle crank pin carried by a shaft D located midway between saidthrough its bearings and has a'rotary-valve E mounted thereon consistingof a solid cylindrical body of a suitable length which re y'specincation of Letters Patent.

yolves in a closely fitting stationary cas- 1 ng F. This casing has alateral nipple e to which leads a vacuum pipef; a lateral port goppositethe nipple and open to the atmosphere; and a nipple G on the axis of thevalve E. The valve has a central chamber z. constantly open to thenipple G, and

a lateral port'm opening from this chamber and registeringalternatelywith the nipple e and the port g as the valve rotates. A pipeI-I, which may, as indicated in the drawings, be flexible, leads fromthe connection G to the outer or closed end a of the cylinder B througha connection J, and a regulating valve K is placed in this connection.

Between the casing F and balancefjvlheel Patented Nov. 14,1916.

Application filed December 19, 1914. Serial No. 878,011. l

C shaft D has a small gear securely mounted thereon and this gear mesheswith a corresponding gear I securely mounted on al short shaft D whichlatter is journaled in bearings secured to and rising from the base, andhas its axis parallel to that of shaft D. The shaft D. carries 4on itsend a valve E fitting within a casing F which may be supported in anysuitable manner, as by means of a clamp R, attaching it to the casing F.The valve E and casing Fare preferably the same in form as the valve andcasing E, F, there being a central valve chamber open at its end andalateral port m and the casing having a lateral nipple e connected with avacuum pipe f; a lateral opening g" open to the atmosphere, and a nippleG contively associated, so that vacuum is applied to the cylinders whentheir pistons are at the ends of their outstrokes, and atmospherei atthe ends of the instrokes.

The balance wheel C being started by hand, the pulsator will run so longas vacuum is maintained in the pipes f, f', and the speed may beregulated by means of the valvesK, K.

Pipes H, H. are provided with lateral nipples, as O, P, Q, as many asmay be desired, for connection with the teat-cups of a milkingapparatus, whereby the motor perl forms the function for which it isdesigned of alternately applying to these cups atmospheric pressure andsuction.

. would serve its purpose lif but one cylinder and valve were used, thebalance wheel being depended .upon for moving the piston in onedirection.

Although the device as shown is adapted to alternately connect theservice pipes or teat-cup leads with the suction pipe and withatmosphere, the invention is o f suiicient scope to include devices in.whlch the a1r introduced may be above atmospheric pressure.

It will be understood thatV the pipes 7, f', may be, and preferably are,branches from the same source of suction or vacuum.

What l claim as new is:

1. ln a pulsator, in combination, a suction pipe, a pair ofservice'pipes, valves for connecting the service pipes alternately withthe suction pipe and a source of air, the valves being oppositely setand means actuated by suction in the service pipes for operating thevalves.

2. In a pulsator,in combination, a suction pipe, a service pipe, a valvefor alternately connecting the service pipe with the suction pipe andwith a source of air, a reciprocating motor for operating the valve, amomentum wheel for re ulating the motor, and connection betweent 'eservice pipe and the motor for actuatin the motor.

3. 1n a pulsator, 1n combination, a suction pipe, a service pipe, avalve for alternately connecting the service pipe with the suction pipeand with a source of air, a reciprocating motor for actuating the valveand having an end of its cylinder open to atmosphere land the other endthereof in communication with the service pipe such comf municationbeing controlled by the named valve.

4. In a pulsator, in combination, avsuction v pipe, a service plpe, a valve for alternately` connecting the service pipe with the suction pipeand with a source of air, a reciprocating motor for actuating the valveand having lan end of its cylinder open to atmoslmunication beingcontrolled by neonata phere, the other end thereof being incommunication with the service pipe, such comthe named valve, and aregulating valve 1n connection with the service pi e. i

5. In a pulsator ihr a milking machine, in combination, two independentservice pipes, teat-cup pipes leading from such service pipe, exhaustpipes, rotating valves connecting each service pipe with one of theexhaust pipes, each valve being adapted to.

open communication between the service pipe with which it is associatedalternately with the exhaust pipe and with a source of air, such twovalves being oppositely set, intermeshing gears connecting the twovalves, and a suction motor controlled by and actuating the valves.

6. In a pulsator for a milking machine, in combination, two independentservice pipes, teat-cup pipes leading` from such service pipes, exhaustpipes, rotating valves connecting each service pipe with one of theexhaust pipes, each valve being adapted to open communication betweenthe service pipe with which it is associated alternately with theexhaust pipe and with a source of air, such two valves being oppositelyset, intermeshing gears connecting the two valves a crank attached tothe spindle of one of the valves, a pair of reciprocating motors eachhaving its piston connected to the crank, and a duct connecting eachservice pipe with one of the motor cylinders.

7. In a pulsator Vfor milking machines, in combination, a service pipe,an exhaust pipe, a valve casing interposed between said pipe and havingan axlal nipple connected to the service pipe and a lateral nippleconnected with the exhaust pipe 'and a lateral port, a rotary valvewithin the casing, such valve having a central chamber, an axial port,and a lateral port, a reciprocating vacuum motor for rotating the valveand a pipe connecting the motor with the service pipe.

In witness whereof l have hereunto set my hand this 11th day ofDecember, 1914.

LION EL BULL. Witnesses:

FRANK D. THoMAsoN, FLORENCE MITCHELL.

